docs: def add_channel_info(self, data, clear=False):
          """ Add channel info data to the channel_id group.
          
          :param data: A dictionary of key/value pairs. Keys must be strings.
              Values can be strings or numeric values.
          :param clear: If set, any existing channel info data will be removed. 
          """
          self.assert_writeable()
          self._add_attributes(self.global_key + 'channel_id', data, clear)